[clang] [clang-tools-extra] Handle recording inheritance for templates (PR #177273)

[Nathan Ridge via cfe-commits]

https://github.com/HighCommander4 commented:

Ok, had another look through the patch and it generally looks quite good. Just have a few minor comments.

And one final request before merging: could we double check the index size numbers reported in [this comment](https://github.com/llvm/llvm-project/pull/177273#issuecomment-3786398323)? The size increase there is almost suspiciously low, and I'd just like to verify that it wasn't due to some issue with an earlier version of the patch.

https://github.com/llvm/llvm-project/pull/177273